38 lines
989 B
C++
38 lines
989 B
C++
/**
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* @name 享元模式
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* @brief: 高效共享大量细粒度对象
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* @note 场景：文本编辑器字符格式、游戏粒子系统
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*/
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class CharacterStyle {
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public:
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CharacterStyle(const std::string& font, int size, bool bold)
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: font(font), size(size), bold(bold) {}
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// 风格属性...
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private:
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std::string font;
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int size;
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bool bold;
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};
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class StyleFactory {
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public:
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CharacterStyle* getStyle(const std::string& font, int size, bool bold) {
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std::string key = font + std::to_string(size) + (bold ? "b" : "");
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if (styles.find(key) == styles.end()) {
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styles[key] = new CharacterStyle(font, size, bold);
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}
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return styles[key];
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}
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private:
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std::unordered_map<std::string, CharacterStyle*> styles;
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};
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class TextCharacter {
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public:
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TextCharacter(char c, CharacterStyle* style)
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: character(c), style(style) {}
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private:
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char character;
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CharacterStyle* style; // 共享的样式对象
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}; |